Birds' Preening Behaviour

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Preening is one of the most frequent observed birds’ behaviour for it is a crucial for them to take care of their feathers. Preening realign feathers in their right position so it can perform its function optimally in flight, and as insulator and waterproofing. By removing parasites during preening, birds can avoid being infected by diseases that can negatively affect their survival. In addition, preening is also known to play a part in pair bonding.


A bird will rub its beak onto a gland, uropygial gland that secretes an oily substance that is then transferred to the feather as the bird nibbles and strokes their feathers. In addition, the oily substance from the gland contains precursor for vitamin D. When it is exposed to the sunlight, it will convert to vitamin D which will be consumed by the bird while preening.

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